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Cavaliers of Mars is now available for purchase!
Cavaliers of Mars is now available for purchase!
885 backers pledged $38,388 to help bring this project to life.


Posted by James Bell (Collaborator)

Hello Cavalier Community,

A big reward day today. The first Backer PDF for the Cavaliers of Mars core rules is being sent out today. A quick message from Rose:

Here it comes: the Cavaliers of Mars core book PDF, ready for play!  

The writing team, the art team and Onyx Path's staff have all worked our butts off on this game. I'm incredibly proud of it, and I'd like to thank everybody who made it possible. I hope in the months and years to come, I'll hear your true tales of poor decision-making, brilliant solutions, and grand adventure.  

Welcome to Mars, my friends! May our joy outlast the world!  


Rose and team are busy working on the Stretch Goal projects now, and I can't wait to see what comes next for Cavaliers of Mars! (I know, getting ahead of myself!)

To keep up, make sure you follow Rose on Twitter (@rose_on_mars) and you can support her efforts through her Patreon at


Your link to claim your Cavaliers of Mars Backers PDF will be sent out by our BackerKit pledge manager today. Since we are using our partners at DriveThruRPG as the host for this, you will need to set up a DriveThru account if you don't have one already. If you encounter any problems with downloading your rewards, please contact DTRPG's customer service to resolve the matter, they've always been top-rated for customer service. 

If you need to review your information or pledge status, you can return to your survey by clicking the link in your survey email or requesting your survey link under "Lost your survey?" on our BackerKit project page at You can also access your available DOWNLOADS from your BackerKit page, which will shortly include the Cavaliers of Mars Backers PDF!

If you used your Facebook credentials to log in to your Kickstarter account, the BackerKit survey is sent to the email address you use for your Facebook account. If you have another email address that you prefer to use, please contact support at

Thanks again for your support and enjoy your Cavaliers of Mars Backer PDF.


This is the first version of the Cavaliers of Mars core rules to be released. Note that there is still an Index and a Auto-Calculating Character sheet to come in further updates. We've sent you this initial Backer PDF for three reasons:

1) To thank you for your support! You helped bring this game into the world, and you deserve to see it first!

2) So you can start playing! These are the actual Core rules - this is the Cavaliers of Mars roleplaying game! It's time to begin your journey to Mars!

3) Make the final version as good as it can be! The design and development teams have done their best to proofread and correct any errors and typos - but some always sneak through. If you catch any typos, incorrect math, visual glitches, and the like, we want to hear about them and correct them before we send the book off to print.

You can report any such issues on the Onyx Path forums here:

Or leave a comment on THIS UPDATE. We won't be collecting errata from other spots, just that specific thread on the OP forum or the comments from this Kickstarter update.

After any needed corrections are made (based on your feedback!), we will prepare am updated final PDF version of the game and you will receive a notice that you can re-download your file with the latest version.

You've already made the game a reality with your Kickstarter support. Now you can make it even better by helping us crowdsource any minor errors.

Kickstarter Concierge

One more quick note, while I've got your attention. Cavaliers of Mars was the very first Onyx Path kickstarter I helped with. Come see how much I've learned (if anything!) with their latest project: Fetch Quest.

Fetch Quest is a family-friendly cooperative deck-building game. Each player represents a pioneer on a dangerous quest. The pioneers work together to overcome dangerous challenges and resolve missions. Once the missions are resolved, the quest is finished and the players win the game. We're running this Kickstarter to get additional new art for the cards and get the project printed in a form we can put into stores.

You can check out the Kickstarter here:

And if you want to learn more about the game, creator Eddy Webb goes through all the rules here:

The game is already funded, and now we want to dig into building our "booster pack" of cards, including adding cat pioneers from the Monarchies of Mau and a new quest deck to discover the secret of Vinsen's tomb.

- James

Ronald Wanders, John Daly, and 9 more people like this update.


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    1. James Bell Collaborator on

      Awesome job, gang! We’ve taken all of that notes and passed them on to the team. Now they’re working on finalizing and indexing the book before sending it off to the printer. Once they have an updated PDF version, they’ll upload the latest version to drivethrurpg and you’ll get a notice that the updated version is available for download.

    2. Navigator on

      68 Paragraph 3 Change "Like the Red and Pales, the Zaius" to Like the Reds and Pales, the Zaius".
      5 Religions Change "Zaius Ancestor Worship" to "Zaiu Ancestor Worship" or "Zaius' Ancestor Worship".
      73 Zaius Ancestor Worship Change "Zaius Ancestor Worship" to "Zaiu Ancestor Worship" or "Zaius' Ancestor Worship".
      73 Zaius Ancestor Worship Change "Most Zaius caravans" to "Most Zaiu caravans" or Most Zaius' caravans".
      80 Characters Danese, Silane & Dax don't have their ancestry noted like other characters.
      81 Characters 4 Change Ansile's "Gift of Gab" trait to "The Gift of the Gab".
      92 Coronal Paragraph 4. Change "Uprisings ae common" to "Uprisings are common"
      93 Xeta Geyser Paragraph 4. Change "attempt to clear the clog system." to "attempt to clear the clogged system."
      96 Hazard 1 Change "Colony of feral spiders who build webbed bridges." to "A colony of feral spiders who build webbed bridges."
      98 Foresight Paragraph 4. Change "Zaius priests frequently" to Zaiu priests frequently".
      98 Foresight Paragraph 4. Capitalise "library of memory".
      99 Character 2 Ozge needs an umlaut on the first letter of her name (Özge) as per Hook 3 on Pg. 98.
      132 Character 1 Change "Niurt, Roundhead harried Yellow Silk priest" to "Niurt, harried Roundhead Yellow Silk priest"
      94-101, 107-111 Characters The characters' adjectives and job titles etc. are fully capitalised. The other characters in Chapter 3 have these uncapitalised except for proper nouns.

    3. Navigator on

      Apologies again for the formatting, I'm pasting from an Excel spreadsheet.

      76 Character 1 Fully capitalise "Makeshift weapons".
      77 Hook 6 Change "the metal rings continues to vibrate softly." to "the metals rings continue to vibrate softly."
      78 Character 2 Hoth, an underdog in the arena, only has a combat pool of 1 Parry. Is this correct?
      78 Hazard 3 Change "After being ridiculed for a particular bad loss" to "After being ridiculed for a particularly bad loss".
      79 Hooks 2 Change "as the orb is as high as two Pale Martians." to "as the orb is as tall as two Pale Martians." OR " high up as…"
      88 Locations "Locations" is in a smaller font than the other cities' descriptions.
      90-92 All Points The first line in each point is slightly less indented than the lines beneath it. This differs from the established pattern.
      91 Hazards Points 4 & 6 have a grey background instead of Points 3 & 5.
      94 Characters The Characters table heading in rendered in plain text without a background.
      108 Himk Characters 3,4,5 & 6 don't have proper "dX" ratings for any of their traits.
      112 Character 6 Anbat has "Swift Fingers 5". This needs a proper "dX" rating.
      122 Character 2 See also Pg. 25 NPCs Point 3. Add "Their" to "Would Do Anything To See Child's Face Again". Unless the character in question is called "Child".
      132 Characters 1 Change Niurt's "Poise" trait to "Resolve".
      132 Characters 2 Change Obasya's "Poise" trait to "Resolve".
      132 Character 4 Change Shemaaz' combat pools of "S1/P1/M1" to "1 Strike/1 Parry/1 Stunt"
      133 Character 5 Change Turns' combat pools of "S1/P0/M0" to "1 Strike".
      137 Character 4 Nasreen's Moneylender should be rated "d8" not "8".
      138 Character 1 Azimuth's Cheerful Soliloquy should be rated "d6" not "6".
      138 Character 3 Tiefa's Fine Breads For Sale should be rated "d6" not"6".
      138 Hazards 5 Change "and any other targets of opportunity that strike the fancy." to "...strike their fancy."

    4. Lofwyr on

      Some errata I've found:

      pg. 27 - "When a strike lands... it inflicts Strain... based on your character’s weapon’s damage." There's no reference to how much damage each weapon does in the table on pg. 217 (unless it's the "Close" column, in which case it needs to be renamed to something less misleading).

      pg. 57 - The Pistoleer talent for Soldiers states that "You spend one fewer Stunt die to reload a firearm than normal for the rest of the scene." There's no mention of Stunt dice being able to do this anywhere else, and it contradicts the ranged weapon rules on pg. 29 which states that reloading happens during the Break phase.

    5. Penguin King Games Inc. on

      Errata-wise, this is me putting my technical writer hat on, so these may be quite nitpicky, but:

      p. 28, second column, first paragraph: the way this is worded implies that basic Strikes and Parries are subject to the one-maneuver-per-round rule, which I'm reasonably sure is not intended.

      p. 28-29: are maneuvers and talents that modify the face value of a Strike or Stunt die intended to alter the timing of the action, or merely its priority for determining what beats what? The text as it stands can be read either way; additionally, if modifiers do alter action timing, it's not clear how this interacts with the general rule that specific actions need not be declared until the die's count comes up.

      p. 28, "Disarm" boxed text: are disarms intended to by Parryable? p. 27 states that Stunts can't be Parried as a general rule, but if this also applies to Disarms it's unclear under what circumstances the Disarm maneuver's Mastery benefit would come into play.

    6. Navigator on

      Seeing as the errata thread is already locked down I'll leave these here. I've been busy, so I'm only a quarter of the way through the PDF :(

      Page No. Type Type Detail

      9 Subheading Change "Chapter 5: Game Master Resources" to "Chapter 5: Game Master Tools" to match Contents.
      17 Header Change "Warefare/Medicine/Lost Places" to "Warfare/Medicine/The Lost Places" to match other headers and correct spelling.
      49 Header Change "Talents" to "Careers". Talents don't start until Pg. 51.
      20/21 Lasting Consequences The 1st & 2nd paragraphs are in a smaller font.
      25 Non-Player Characters Point 2 is in a smaller font.
      25 Non-Player Characters Point 2, line 1 has a large justifying gap. This could be reduced by dropping "An", then referring to plural characters.
      25 Non-Player Characters Point 3, line 1 is misaligned.
      24 Character Creation Points 10 & 11 are misaligned to the other points.
      25 Non-Player Characters Point 3. Add "Their" to "Would Do Anything To See Child's Face Again". Unless the character in question is called "Child".
      30 The Map The image uses the UK spelling of theatre, but the the US spelling is used on line 5. No other instances of either spelling are in the book.
      30 The Map Change "Here’s an example map:" to "An example is given below." The way it is written makes it look like the image was supposed to be directly below the example map text. Alternatively, delete "Here’s an example map:" and add "(see below diagram)" to "For example, in a theater,"
      30 Range "In the above example" should read "In the below example" as the referred map is at the bottom of the page.
      30 Range "and that field of fire isn't" should read "and that their field of fire isn't".
      35 Chiaro Recheck "People of all ilk". Does ilk have a irregular plural like sheep?
      38 Siren Change "was" to "were" in "Your family was either farmers, guards or criminals."
      38 Siren Point 4. Fully capitalise "labyrinth of Himk".
      Various Query Recheck Stonemason is entered as two words in the book
      52 Forceful Talents "In Demand" should be above "Offer They Can't Refuse" not below.
      Career Talents Some of these talents have a trait. Why? Typo?
      58 Evasive Footwork Change "gains additional Parry dice for every enemy attacking him past the first." to "gains an additional Parry die…"
      58 Path of the Coward Delete "(Maximum once per session)". It's redundant as each trigger only gives a reward once per session as per Improvement and Change Pg. 23.

    7. Matthew Shaw on

      On p.37, the entry for Foresight only has 5 options. Not sure if that's an error but all the others have 6.

    8. Matthew Shaw on

      On p.35, option 4 for Battlehymn should have a white background but it's grey.

    9. Missing avatar

      EmeraldSpear on

      Loving the game! A couple little things: In the Cavalier section on page 43 it mentions a 'Terro' and a 'Zomek'. The only other mention of a Terro (and it's cousin the Ostoros) is on page 17, but nowhere does it give a description and/or stats. The Zomek are similarly mentioned only briefly with no clear description of what they are (p.46). I'm assuming they were accidentally left out of the beastiary.

    10. Matthew Shaw on

      In the example character creation for Valentine, it says the trait "Clockwork Heart" is stepped up to D8 but in the stats below, it says D10. Also, I'd like to change how I'm listed as well :)

    11. Missing avatar

      Don Bisdorf on

      On page 8 and page 20, the action rules state that you roll a pool of dice and "pick the highest", which I would have assumed meant "pick the single highest die", except that some of the other rules later mention keeping two dice. Shouldn't the basic action descriptions on page 8 and 20 explicitly say "pick the two highest and add them"?

    12. James Bell Collaborator on

      @Ted P.: I can solve that for you. I’ll send you an email later today.

    13. Ted P. on

      How would I go about changing the name that I am listed under in the backer list? My last name got shortened to an initial and a period, and I'd prefer my full name be in the book, if possible. I dug around on BackerKit but didn't find any way to change it. Any advice would be appreciated. Thanks!